Grand Canyon Matthes Survey of . BLACK AND WHITE GLASS LANTERN SLIDE. LABEL READING "ON THE CAMBRIAN SHALES, MUAV CANYON GRAND CANYON, ARIZ " SHOWS A LINE OF PACK MULES WITH ONE MAN AHEAD AND ANOTHER MAN BEHIND THE MULES. CIRCA 1902 WITH A GROUP OF SLIDES FROM THE MATTHES SURVEY EXPEDITION IN THE GRAND CANYON - CIRCA 1902

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Photo credit: © Natural History Archive / Alamy / Afripics
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Keywords: america, american, archive, arizona, canyon, coconino, conservation, country, county, grand, historic, history, land, lands, matthes, mohave, muav, mule, national, natural, nature, np, pack, park, parks, preserve, public, service, trans, usa, widlife, wilderness